So just to give you all an update -
I emailed the tiler on Friday night to state how unhappy we were with his time keeping till date (considering his website states how punctual he is and how 'he takes the stress away from his clients') and how we had researched into the method of how to actually lay the pathway correctly and found that we had some fundamental issues (or to that affect).
We ended the email with the option of re-lifting the tiles and relaying it correctly or if he was unable to or could not do this, to lift up the tiles and return them to us by the 27th May 2016.
The tiler was suppose to turn up yesterday at 10am (as agreed prior to the email was sent) which he didn't...
While we were thinking this is going to be a long road we received a phone call from the tiler stating that he was very sorry and he has messed up, not communicated as he should have and that in trying to build the base of the path up with adhesive has caused all the issues.
After discussing a few options (one of relaying the path which he didn't sound confident of doing again) we decided it was best of he provided a full refund on the half we had already paid him and to refund the cost of the tiles that he has put down (he will not pay for those we still have in stock) while lifting them all up to be reused, so the base was ready to tile on again...
The conversation was left at - when he turns up to lift the tiles (which is currently now) we will discuss and come to a final agreement.
I have spoken to a few victorian tiling specialists since then and it seem they may need to add heigh to the concrete base/screed and they generally supply their own tiles...
How should I go about finishing this off in the best possible manner with the current tiler?
Should I get him to sign a document that I also sign which states how we have decided to conclude this whole saga?
Should the tiler provide a full refund on all the tiles (he can keep them all) as a form of compensation so I can go out and choose a tiler that may provide his own tiles?
Any suggests on how to conclude this would be really appreciated.
Thanks to all that have provided info till dat!